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에어컨 실외기 내 축류팬 유동소음 예측을 위한 수치해석적 연구
전완호(Won-Ho Jeon),이여해(Yeohae Lee),임태균(Tae-Gyun Lim),박준철(Jun-Churl Park),Gaku Minorikawa 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
The current study investigates the aeroacoustic noise characteristics of two axial flow fans in outdoor unit of air conditioner by performing CFD (Computational Fluid Dynamics) simulation and CAA (Computational Aeroacoustics) method. The predicted aeroacoustic noise and the performances, obtained respectively from CAA and CFD results about axial flow fans, are in good agreement with the experimental results. Deviation of overall SPL (Sound Pressure Levels) between CAA results and the experimental ones represents 5% approximately, and follows qualitatively the trend within the relationship. Additionally, using CFD and CAA data helped to design the low noise fan because it can visualize regions that can be improved. As a result, overall SPL reductions of 2 dBA occurred. It is indicated that the overall SPL of existing model is 67.92 dBA and new model is 65.91 dBA respectively based on the CFD results. Therefore, CFD and CAA method can help the fan designer to design low noise axial flow fan.